Stick the cherry tomatoes and marinated mozzarella balls onto skewers, alternating. Chop the onion stalks into small pieces and pour them into a bowl. Add the cream cheese, sprinkle with dill, salt and squash with a fork.
Cut the cucumbers into very thin slices. On each slice, pour a little of the filling and twist it into a roll. Pin the rolls through the middle with toothpicks and arrange upright in suitable dishes.